EP3879112A1 - Circulateur d'air - Google Patents

Circulateur d'air Download PDF

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Publication number
EP3879112A1
EP3879112A1 EP21150720.7A EP21150720A EP3879112A1 EP 3879112 A1 EP3879112 A1 EP 3879112A1 EP 21150720 A EP21150720 A EP 21150720A EP 3879112 A1 EP3879112 A1 EP 3879112A1
Authority
EP
European Patent Office
Prior art keywords
air
discharge
guide
suction grill
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21150720.7A
Other languages
German (de)
English (en)
Inventor
Joonmin Park
Taeman Yang
Junho MIN
Choonmyun Chung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP3879112A1 publication Critical patent/EP3879112A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • an air circulator and, more particularly, an air circulator to which a mixed flow fan and a guide vane are applied.
  • Air circulators are devices designed to circulate air to provide a pleasant environment, and are also referred to as circulators. Air circulators are identical with wing-type fans in terms of the theory that wings attached to a motor produce air. However, the circulators are different from the fans in that the circulators enable air to move linearly to a far area and uniformize air in an indoor space. Additionally, air circulators can move cold air up and move hot air down, and can reduce electricity consumption when they operate along with an air conditioner.
  • the air circulator can be rotated in a desired direction to readily distribute purified air.
  • An air circulator includes a fan motor, and a blowing fan that is coupled to a rotation shaft of the fan motor and is configured to suction air while rotating as a result of driving of the fan motor and to discharge air.
  • the blowing fan is classified as an axial flow fan, a centrifugal fan and the like, based on a direction of movement of air.
  • the axial flow fan has a structure where air is suctioned in a direction (hereinafter "shaft direction") of the rotation shaft of the fan motor and is discharged in the shaft direction.
  • the centrifugal fan has a structure where air is suctioned in the shaft direction and discharged in a radial direction.
  • the axial flow fan has been used as a blowing fan of an air circulator of the related art.
  • a reduction in a surface area of a discharge flow channel results in a significant reduction in an amount of air, and, while air passes through a guide vane, loss of energy of an air flow can occur.
  • An air cleaning apparatus is disclosed as a related art in Korean Patent No. 10-1955877 (registered on March 3, 2019 ).
  • the present disclosure is directed to an air circulator using a mixed flow fan that may generate a larger amount of air than an axial flow fan on a limited surface area of a flow channel to smoothly circulate air.
  • the present disclosure is also directed to an air circulator that may include a guide vane capable of reducing loss of flow energy to allow air current to move a predetermined distance or greater.
  • An air circulator may include a suction grill part provided with a passage through which air is suctioned, a discharge guide coupled to the suction grill part and configured to guide discharge of air suctioned through the suction grill part, a motor connected to the discharge guide and configured to supply a rotational power, and a mixed flow fan connected to the motor, rotatably installed in an inner space between the suction grill part and the discharge guide and configured to discharge air, suctioned through the suction grill part, through the discharge guide upward at a slant.
  • the air circulator may further include a front panel mounted onto a front surface of the discharge guide.
  • the front panel may have a circular plate shape, and may have a guide vane configured to guide discharge of air along an outer circumference of the front panel.
  • the suction grill part may include a suction grill facing the inner space and forming a passage through which air moves, and a suction body installed along an outer circumference of the suction grill and extended toward an edge of the discharge guide.
  • the discharge guide may include a core member which is configured to support the motor and movement of which is constraint, a guide vane installed along an upper circumference of the core member and configured to guide discharge of air, and a discharge body installed along an outer circumference of the guide vane and extended toward the suction body.
  • a front panel may be installed at a front of the core member, and the motor may be installed between the core member and the front panel.
  • the mixed flow fan may include a connection body disposed between the core member and the suction grill, connected to an output shaft of the motor and configured to rotate along with the output shaft, an inner body extended from the connection body, installed in a way that encircles the core member and spaced from the core member, an outer body installed outside the connection body in a ring shape and spaced from the suction body, and a wing member configured to connect the inner body and the outer body.
  • the inner body and the outer body may be installed at a slant with respect to the suction grill.
  • the inner body may be installed in a concave form toward a direction where the core member is installed.
  • the wing member may be a rectangular plate, and a plurality of wing members may be installed along an outer circumference of the inner body and installed upward at a slant.
  • inner diameters of the inner body and the outer body gradually increase toward the discharge guide.
  • the outer body may further include an inlet projection protruding from the outer body to a rear where the suction grill part is disposed, and forming a projection having a ring shape.
  • the suction grill part may further include a bell mouth protruding from the suction body toward the mixed flow fan along an edge of the suction grill, and extending toward an inside of the inlet projection.
  • a gap between the bell mouth and the inlet projection may be less than a gap between the outer body and the suction body.
  • connection body may include a hub plate having a circular plate shape, a shaft coupler disposed at a center of the hub plate in a radial direction thereof and connected to the motor, and a first reinforcement projection extending from the shaft coupler radially.
  • An air circulator may use a mixed flow fan to circulate air such that the mixed flow fan generates a larger amount of air than an axial flow fan to smoothly circulate air.
  • the air circulator may reduce loss of energy of an air flow discharged along a guide vane and move air current to move a predetermined distance or greater, thereby saving energy.
  • first the terms “first”, “second” and the like are used herein only to distinguish one component from another component. Thus, the components should not be limited by the terms. Certainly, a first component can be a second component unless stated to the contrary.
  • one component When one component is described as being “in an upper portion (or a lower portion)" of another component, or “on (or under)” another component, one component may be placed on the upper surface (or under the lower surface) of another component, and an additional component may be interposed between another component and one component on (or under) another component.
  • one component When one component is described as being “connected”, “coupled”, or “connected” to another component, one component can be directly connected, coupled or connected to another component; however, it is also to be understood that an additional component can be “interposed” between the two components, or the two components can be “connected”, “coupled”, or “connected” through an additional component.
  • each component can be provided as a single one or a plurality of ones, unless explicitly stated to the contrary.
  • a and/or B as used herein can denote A, B or A and B, and the terms “C to D” can denote greater than C and less than D, unless stated to the contrary.
  • FIG. 1 is an exploded perspective view showing an example air circulator 1
  • FIG. 2 is a plane view showing an example air circulator 1.
  • the air circulator 1 may include one or more of a suction grill part 10, a discharge guide 20, a motor 40, a mixed flow fan 50 and a front panel 60.
  • the air circulator 1 may be installed in an air conditioner in a row, and may be installed in an air purifier such as an air conditioner in a row. Accordingly, the air circulator 1 may be installed in many different ways.
  • the suction grill part 10 may be implemented in many different forms within the scope of the technology by which the suction grill part 10 is provided with a passage through which air is suctioned.
  • the suction grill part 10 may include a suction grill 12 and a suction body 14.
  • the suction grill 12 may be implemented in many different forms within the scope of the technology by which the suction grill 12 faces an inner space 30 and forms a passage through which air moves. Edges of the discharge guide 20 and the suction grill part 10 may be coupled, and the inner space 30 for installing the mixed flow fan 50 may be formed between the discharge guide 20 and the suction grill part 10.
  • the suction grill 12 may be provided with a plurality of vents.
  • vents having a straight line shape may be installed on a circular plate in a row.
  • the suction body 14 may be installed along an outer circumference of the suction grill 12, and may be implemented in many different forms within the scope of the technology by which the suction body 14 extends toward the edge of the discharge guide 20.
  • the suction body 14 according to one embodiment may extend from the edge of the suction grill 12 toward the edge of the discharge guide 20 at a slant.
  • the suction body 14 may extend in a concave form toward the front while facing an outer body 53 of the mixed flow fan 50, and may be provided with the suction grill 12 for movement of air at a center of the suction body 14.
  • the suction grill part 10 may further include a bell mouth 132 protruding from the suction body 14 toward the mixed flow fan 50 along the edge of the suction grill 12, and extending toward an inside of an inlet projection 121.
  • the bell mouth 132 may protrude from the suction body 14 toward the mixed flow fan 50 along the edge of the suction grill 12, and may be installed in a ring shape.
  • the bell mouth 132 may have a concavely-shaped longitudinal cross section encircling an end of the inlet projection 121 provided at the outer body 53, and may extend along a circumferential direction.
  • the bell mouth 132 may be formed in a way that encircles an outer circumferential surface of the suction grill 12 at the center of the suction body 14.
  • the bell mouth 132 may have a projection shape that extends toward the inside the inlet projection 121, and may guide air to an inlet of the mixed flow fan 50 through the suction grill 12. Additionally, a gap between the bell mouth 132 and the inlet projection 121 is less than a gap between the outer body 53 and the suction body 14. Accordingly, air moving along the outer body 53 and the suction body 14 may be prevented from coming out between the bell mouth 132 and the inlet projection 121, thereby blocking the air from spinning. Since the mixed flow fan 50 prevents air from spinning, air blow efficiency of the mixed flow fan 50 may improve.
  • the bell mouth 132 may be at least partially inserted into the outer body 53 in a radial direction.
  • the bell mouth 132 ma guide a suction flow at an inlet of the mixed flow fan 50 and help the mixed flow fan 50 to improve suction and discharge performance.
  • the discharge guide 20 may be coupled to the suction grill part 10, and may be implemented in many different forms within the scope of the technology by which discharge of air suctioned through the suction grill part 10 is guided.
  • the discharge guide 20 may include a core member 21, a motor bracket 22 and a discharge body 27.
  • the core member 21 may be implemented in many different forms within the scope of the technology by which movement of the core member 21 is constrained while the core member 21 supports the motor 40.
  • the core member 21 according to one embodiment may be disposed at a central portion of the discharge guide 20, and may be provided with a front panel at the front (the left in FIG. 1 ) of the core member 21.
  • the core member 21 may have a shape that is concave toward the front, and a motor 40 may be installed between the core member 21 and the front panel 60.
  • the core member 21 may be provided with a motor bracket 22 that fixes the motor 40.
  • the motor bracket 22 may protrude from a body of the core member 21 toward the front, and may be installed in a way that encircles the front of the motor 40.
  • the guide vane 23 may be installed along an upper circumference of the core member 21, and may be implemented in many different forms within the scope of the technology by which the guide vane 23 guides discharge of air.
  • the guide vane 23 according to one embodiment may be disposed between the core member 21 and the discharge body 27, and a plurality of guide vanes 23 may be installed along an outer circumference of the core member 21 at a slant.
  • a plate bent along/in a curve surface shape may be installed radially around the core member 21.
  • one side of the guide vane 23 may be connected to an edge of the core member 21, and the other side of the guide vane 23 may be connected to a lower side of the discharge body 27 extending in a strap shape along the circumferential direction. Accordingly, the guide vane 23 may be installed at a slant in a diagonal direction and installed to face a wing member 54.
  • the discharge body 27 may be disposed outside the guide vane 23, a foreign substance may be prevented from coming into the guide vane 23. Further, since the guide vane 23 is installed at a slant, a surface area for discharging air may increase, and more air may be discharged out of the guide vane 23. Furthermore, since the discharge body 27 having a cylindrical shape may be disposed outside the guide vane 23, air discharged from the guide vane 23 may make a linear movement in one direction while contacting the discharge body 27, thereby improving the linearity of the discharged air and enabling the discharged air to move far away.
  • the guide vane 23 disposed between the core member 21 and the discharge body 27 may be installed at a slant while facing a wing member 54. Accordingly, air moving to the guide vane 23 through the wing member 43 may pass through the guide vane 23 while forming an angle of 90 degrees with the guide vane 23, thereby reducing friction of air against the guide vane 23. Thus, friction resistance of air discharged from the mixed flow fan 50 and passing through the guide vane 23 may be reduced.
  • the discharge body 27 connected to an outer end of the guide vane 23 may be provided with a guide curved surface 271 having a concave shape such that air discharged from the guide vane 23 has linearity.
  • the guide curved surface 271 may protrude toward the inside of the discharge body 27, and have a diameter which gradually increases from a portion connected to the guide vane 23 toward the front of the discharge body 27 through which air is discharged. Accordingly, air discharged at a slant through the mixed flow fan 50 and the guide vane 23 may be guided toward a front of the air circulator 1 when discharged along the guide curved surface 271, thereby minimizing flow resistance of the air and ensuring linearity of the air.
  • the discharge body 27 may be installed along an outer circumference of the guide vane 23, and may be implemented in many different forms within the scope of the technology by which the discharge body 27 extends toward the suction body 14.
  • the discharge body 27 according to one embodiment may be connected to the suction body 14 and form a side of the air circulator 1.
  • An inner space 30 may be formed between the discharge guide 20 and a suction grill part 10.
  • the discharge guide 20 is provided with the guide vane 23 installed at a slant, friction, which is caused by air discharged from the mixed flow fan 50 when the air contacts the guide vane 23, may be minimized, and the mixed flow fan 50 may reduce loss of energy of the air and enable air current to move farther away than an axial flow fan despite a relative small amount of air.
  • FIG. 3 is a lateral cross-sectional view showing an example air circulator 1.
  • the motor 40 may be implemented in many different forms within the scope of the technology by which the motor 40 is connected to the discharge guide 20 and supplies a rotational power to rotate the mixed flow fan 50.
  • the motor 40 according to one embodiment may be fixed to the core member 21.
  • a body of the motor 40 may be mounted onto the motor bracket 22 installed at a front of the core member 21, and an output shaft 42 extended from the motor 40 may be connected to the mixed flow fan 50 in the inner space 30.
  • FIG. 4 is a side view showing an example mixed flow fan 50.
  • the air circulator 1 uses the mixed flow fan 50 instead of an axial flow fan to discharge as much air as possible under the conditions of limited surface area of a flow channel.
  • air having passed through the mixed flow fan 50 may pass through the guide vane and be discharged out of the discharge guide 20.
  • the mixed flow fan 50 may circulate air current while minimizing a reduction in air amounts on a limited surface area of a discharge flow channel. Since the air circulator 1 according to one embodiment uses the mixed flow fan 50, the air circulator 1 may ensure relatively little loss of air amounts even when a surface area of a discharge flow channel is reduced. Additionally, the mixed flow fan 50 may help to generate a larger amount of air than an axial flow fan on a limited surface area of a flow channel, thereby enabling a smooth circulation of air.
  • the mixed flow fan 50 may be connected to the motor 40 and rotatably installed in the inner space 30 between the suction grill part 10 and the discharge guide 20.
  • the mixed flow fan 50 may be implemented in many different forms within the scope of the technology by which air suctioned through the suction grill part 10 is discharged upward through the discharge guide 20 at a slant.
  • the mixed flow fan 50 according to one embodiment may include a connection body 51, an inner body 52, an outer body 53 and a wing member 54.
  • connection body 51 may be disposed between the core member 21 and the suction grille 12, connected to the output shaft 42 of the motor 40 and implemented in many different forms within the scope of the technology by which the connection body 51 rotates together with the output shaft 42.
  • the connection body 51 may have a cylindrical shape, may be connected to the output shaft 42 and may rotate together with the output shaft 42. Additionally, the connection body 51 may be disposed at a central portion where a gap between the core member 21 and the suction grille 12 is narrowest.
  • connection body 51 may be disposed at a center of the mixed flow fan 50 and may be implemented in many different forms within the scope of the technology by which the connection body 51 is supplied with an external driving force to rotate.
  • connection body 51 may be disposed at the center of the mixed flow fan 50 in a radial direction thereof, and may rotate together with the output shaft 42 extended from the motor 40.
  • the connection body 51 may include a hub plate 101, a shaft coupler 102 and a first reinforcement projection 103.
  • the hub plate 101 may be formed into a circular plate in parallel with the front panel 60.
  • the hub plate 101 may be provided with a shaft coupler 102.
  • the shaft coupler 102 may be disposed at a center of the hub plate 101 in a radial direction thereof.
  • the shaft coupler 102 may be formed to protrude from the hub plate 101 toward the motor 40.
  • the shaft coupler 102 may be coupled to an end of the output shaft 42 configured to deliver a rotational power in a shaft direction thereof.
  • the shaft coupler 102 may be coupled to the output shaft 42 in a way that the output shaft 42 is fitted into the shaft coupler 102.
  • the first reinforcement projection 103 may be installed at predetermined intervals along an outer circumference of the shaft coupler 102.
  • the first reinforcement projection 103 may be radially installed around the shaft coupler 102, and the first reinforcement projection having a plate shape may be installed outside the shaft coupler 102. Additionally, the first reinforcement projection may extend radially from the shaft coupler 102.
  • the inner body 52 may be installed in a way that extends from the connection body 51 and encircles the core member 21, and may be implemented in many different forms within the scope of the technology by which the inner body 52 is spaced apart from the core member 21.
  • the inner body 52 according to one embodiment may be installed in a concave form that encircles an inside of the core member 21. That is, the inner body 52 may be installed in a concave form toward a direction in which the core member 21 is installed, thereby ensuring a maximum size of a space, where the wing member 54 is installed, between the inner body 52 and the outer body 53 and an increase in an amount of discharged air.
  • the inner body 52 may protrude from an edge of the hub plate 101 toward the guide vane 23.
  • the inner body 52 may form an inclined surface that inclines outward radially as the inner body 52 become farther from the hub plate 101.
  • An inner diameter of the inner body 52 may gradually increase from the connection body toward the front panel.
  • a shape, where the hub plate 101 and the inner body 52 are connected may be a truncated cone, which has a hollow hole therein and one side of which is open.
  • the inner body 52 may have a funnel shape the front of which faces the front panel and is open, and the rear of which is closed by the hub plate 101.
  • the outer body 53 may be installed in a ring shape outside the connection body 51, and may be implemented in many different forms within the scope of the technology by which the outer body 53 is spaced from the suction body 14.
  • the outer body 53 according to one embodiment may have a plate shape and may be installed at a slant along a circumference.
  • the inner body 52 and the outer body 53 may be installed at a slant with respect to the suction grill 12. Additionally, the inner body 52 and the outer body 53 may be installed in parallel with each other or installed to face each other.
  • the outer body 53 may be installed along an outer circumference of the inner body 52, and may be connected to the inner body 52 by the wing member 54.
  • An outer diameter of the inner body 52 and an inner diameter of the outer body 53 may gradually decrease from the front toward the rear.
  • the inner diameters of the inner body 52 and the outer body 53 may gradually increase toward the discharge guide 20.
  • a direction in which the front panel 60 is disposed is referred to as the front, and a direction in which the suction grill part 10 is disposed is referred to as the rear.
  • the outer body 53 may be spaced a predetermined distance apart from the inner body 52 radially, and may be disposed outside the inner body 52 in a radial direction thereof. Additionally, the outer body 53 may be spaced from the inner body 52 by a distance corresponding to a length of the wing member 54 in a radial direction thereof. Each wing member 54 may connect between the inner body 52 and the outer body 53.
  • the outer body 53 may form an inclined surface approximately in parallel with the inner body 52.
  • the inner body 52 and the outer body 53 are disposed such that a gap between the inner body 52 and the outer body 53 may gradually increase toward a front of the outer body 53, for example.
  • An inlet projection 121 at a rear of the outer body 53 may be a projection having a ring shape, and may extend from the funnel-shaped outer body 53 to the rear where the suction grill part 10 is disposed.
  • the inlet projection 121 may be disposed inside a bell mouth 132 installed in the suction grill part 10. Accordingly, air moving between the outer body 53 and the suction body 14 along the outside of the outer body 53 may prevent air suctioned into an inlet of the mixed flow fan 50 from making a spinning movement.
  • the wing member 54 may connect the inner body 52 and the outer body 53, and may be implemented in many different forms within the scope of the technology by which the wing member 54 discharges air suctioned into the inner space 30 to the guide vane 23 through the suction grill part 10.
  • the wing member 54 may have a rectangular plate shape, and a plurality of wing members 54 may be installed along the outer circumference of the inner body 52. Further, the wing member 54 may be installed to incline upward (with respect to FIG. 3 ), to maximize a surface area in contact with air.
  • a plurality of wing members 54 may be provided and spaced at regular intervals along an outer circumferential surface of the connection body 51.
  • the wing member 54 may protrude outward from the inner body 52 and extend in a spiral shape. Additionally, the plurality of wing members 54 may be spaced a predetermined distance apart from each other along a circumferential direction of the inner body 52.
  • the wing member 54 may protrude outward from the inner body 52 along a centrifugal direction spirally extending from the center of the shaft coupler 102. Additionally, under the assumption that a direction from the outside of the shaft coupler 102 toward the shaft coupler 102 is a radial direction, an inside of the wing member 54 in the radial direction thereof may be connected to the inner body 52, and an outside of the wing member 54 in the radial direction thereof may be connected to the outer body 53.
  • the inner body 52 which is a portion directly connected to the wing member 54, may be a portion directly contacting air passing through the wing member 54.
  • the inner body 52 may closely relate to a flow path of air passing through the air circulator 1.
  • the front panel 60 may be implemented in many different forms within the scope of the technology by which the front panel 60 is mounted onto a front surface of the discharge guide 20 and protects the motor 40.
  • the front panel 60 according to one embodiment may have a circular plate shape, and may be provided with the guide vane 23 that guides discharge of air along an outer circumference of the front panel 60.
  • FIG. 5 is a perspective view showing an example guide vane 23.
  • the guide vane 23, as shown in FIG. 5 may include a vane body 24 forming a curved surface where a plate having a trapezium shape is convexly bent as a whole.
  • a widthwise length of a first end 25 on one end of the vane body 24 may be less than a widthwise length of a second end 26 on the other end of the vane body 24.
  • a curvature radius of the first end 25 is defined as a first curvature radius (R hub ), and a curvature radius of the second end 26 is defined as a second curvature radius (R shroud ).
  • An angle formed by the first end 25 and a horizontal virtual line is defined as a first angle ( ⁇ 1 hub ), and an angle formed by the second end 26 and the horizontal virtual line is defined as a second angle ( ⁇ 1 shroud ).
  • a range of the first angle ( ⁇ 1 hub ) may be expressed as formula 1.
  • ⁇ 1 hub 50 ° ⁇ 60 °
  • a value as a result of division of the first curvature radius (R hub ) by a diameter (d) of the mixed flow fan may be expressed as formula 2.
  • R hub / d 0.035 ⁇ 0.055
  • a range of the second angle ( ⁇ 1 shroud ) according to one embodiment may be expressed as formula 3.
  • ⁇ 1 shroud 25 ° ⁇ 35 °
  • a value as a result of division of the second curvature radius (R shroud ) by the diameter (d) of the mixed flow fan may be expressed as formula 4.
  • R shroud / d 0.03 ⁇ 0.05
  • the number of the guide vanes 23 may be set to 65 to 80. When the number of the guide vanes 23 is less than 65, a space among the guide vanes 23 may be wide enough for a finger and the like to be inserted into the inner space 30. Accordingly, the finger may contact the mixed flow fan 50, causing a safety accident.
  • the guide vane 23 designed as described above, loss of energy of discharged air may be reduced, and air current may move farther away than usual. Additionally, since the guide vane 23 serves as a grill for improving safety of a user, the user's finger or other foreign substances may be prevented from contacting a rotating mixed flow fan 50.
  • FIG. 6 is a table showing a result of interpretation of a change in air amounts based on a size of an example front panel 60.
  • FIG. 6 shows that, under the assumption that a diameter of the discharge guide is set to D, air amounts and shaft horse power of an axial flow fan and the mixed flow fan 50 when a diameter of the front panel 60 is 0.54, 0.59 and 0.73 times greater than the diameter (D) of the discharge guide.
  • An increase in the size of the front panel 60 may result in a reduction in air amounts in all cases.
  • the mixed flow fan 50 instead of an axial flow fan is applied, the mixed flow fan 50 may help ensure a larger amount of air than the axial flow fan even in a relatively small discharge outlet.
  • connection body 51 connected to the output shaft 42 of the motor 40 may rotate.
  • the wing member 54 connecting the inner body 52 and the outer body 53 may rotate, while the inner body 52 and the outer body 53 connected to the connection body 51 rotate.
  • air may be suctioned through the suction grill 12 disposed in the shaft direction and may be discharged upward (with respect to FIG. 3 ) at a slant.
  • the air discharged through the wing member 54 may be discharged out of the guide vane 23 and then may be moved forward (the left with respect to FIG. 1 ) by the discharge body 27 while making a linear movement.
  • the mixed flow fan 50 may be used to circulate air, as described above. Accordingly, the mixed flow fan 50 may produce a larger amount of air than an axial flow fan to facilitate air circulation. Further, the mixed flow fan 50 may help reduce loss of flow energy of air discharged along the guide vane 23, thereby enabling air current to move a predetermined distance or greater and ensuring energy savings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP21150720.7A 2020-03-10 2021-01-08 Circulateur d'air Withdrawn EP3879112A1 (fr)

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KR1020200029852A KR20210114300A (ko) 2020-03-10 2020-03-10 에어 서큘레이터

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EP3879112A1 true EP3879112A1 (fr) 2021-09-15

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EP21150720.7A Withdrawn EP3879112A1 (fr) 2020-03-10 2021-01-08 Circulateur d'air

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US (1) US20210285686A1 (fr)
EP (1) EP3879112A1 (fr)
KR (1) KR20210114300A (fr)
CN (1) CN113374715A (fr)

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US20220008856A1 (en) * 2020-07-10 2022-01-13 Lg Electronics Inc. Air cleaner
WO2023226398A1 (fr) * 2022-05-27 2023-11-30 珠海格力电器股份有限公司 Ventilateur à flux mixte et climatiseur du type conduit d'air

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WO2020103400A1 (fr) * 2018-11-22 2020-05-28 广东美的制冷设备有限公司 Roue éolienne à flux axial et climatiseur la comprenant
CA3145548A1 (fr) * 2019-07-01 2021-01-07 Syracuse University Unite de traitement d'air compacte et a haut rendement pour systemes de cvca residentiels
US11946488B2 (en) * 2021-06-09 2024-04-02 Glenn B. Smith Fruit or vegetable shaped fan for dispersing airborne eye irritants

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CN107956744A (zh) * 2017-10-11 2018-04-24 珠海格力电器股份有限公司 导流结构、混流风机及吸油烟机
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WO2019194637A1 (fr) * 2018-04-06 2019-10-10 엘지전자 주식회사 Ensemble ventilateur et climatiseur associé

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US20100111667A1 (en) * 2007-04-05 2010-05-06 Borgwarner Inc. Ring fan and shroud air guide system
US20190264948A1 (en) * 2016-02-26 2019-08-29 Lg Electronics Inc. Air cleaner
KR101955877B1 (ko) 2016-06-13 2019-05-30 엘지전자 주식회사 공기 청정기
CN107956744A (zh) * 2017-10-11 2018-04-24 珠海格力电器股份有限公司 导流结构、混流风机及吸油烟机
WO2019194637A1 (fr) * 2018-04-06 2019-10-10 엘지전자 주식회사 Ensemble ventilateur et climatiseur associé

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Publication number Priority date Publication date Assignee Title
US20220008856A1 (en) * 2020-07-10 2022-01-13 Lg Electronics Inc. Air cleaner
WO2023226398A1 (fr) * 2022-05-27 2023-11-30 珠海格力电器股份有限公司 Ventilateur à flux mixte et climatiseur du type conduit d'air

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KR20210114300A (ko) 2021-09-23
US20210285686A1 (en) 2021-09-16
CN113374715A (zh) 2021-09-10

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